80440138 has 4 divisors (see below), whose sum is σ = 120660210. Its totient is φ = 40220068.

The previous prime is 80440123. The next prime is 80440159. The reversal of 80440138 is 83104408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43388569 + 37051569 = 6587^2 + 6087^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110033 + ... + 20110036.

Almost surely, 2^80440138 is an apocalyptic number.

80440138 is a deficient number, since it is larger than the sum of its proper divisors (40220072).

80440138 is a wasteful number, since it uses less digits than its factorization.

80440138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40220071.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 80440138 is about 8968.8426232151. The cubic root of 80440138 is about 431.6757003985.

The spelling of 80440138 in words is "eighty million, four hundred forty thousand, one hundred thirty-eight".